package com.atguigu.gmall.item.controller;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.list.client.ListFeignClient;
import com.atguigu.gmall.model.product.BaseCategoryView;
import com.atguigu.gmall.model.product.SkuInfo;
import com.atguigu.gmall.model.product.SpuSaleAttr;
import com.atguigu.gmall.product.client.ProductFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;

@RestController
@RequestMapping("/api/product")
public class itemApiController {

    @Autowired
    private ProductFeignClient productFeignClient;

    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;

    @Autowired
    private ListFeignClient listFeignClient;

    // 获取商品详情页面 所有数据
    @GetMapping("/getItem/{skuId}")
    public Map getItem(@PathVariable Long skuId) {
        Map result = new HashMap();

        CompletableFuture<SkuInfo> skuInfoCompletableFuture = CompletableFuture.supplyAsync(() -> {
            // 1：skuInfo
            SkuInfo skuInfo = productFeignClient.getSkuInfo(skuId);
            result.put("skuInfo", skuInfo);
            return skuInfo;
        }, threadPoolExecutor);

        CompletableFuture<Void> categoryViewCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            // 2：三级分类
            BaseCategoryView baseCategoryView = productFeignClient.getBaseCategoryView(skuInfo.getCategory3Id());
            result.put("categoryView", baseCategoryView);
        }, threadPoolExecutor);

        CompletableFuture<Void> spuSaleAttrListCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            // 4：销售属性及属性值
            List<SpuSaleAttr> spuSaleAttrAndChecked = productFeignClient.getSpuSaleAttrAndChecked(skuInfo.getSpuId(), skuInfo.getId());
            result.put("spuSaleAttrList", spuSaleAttrAndChecked);
        }, threadPoolExecutor);

        CompletableFuture<Void> valuesSkuJsonCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            // 5：组合对应skuId
            Map saleAttrValuesBySpu = productFeignClient.getSaleAttrValuesBySpu(skuInfo.getSpuId());
            result.put("valuesSkuJson", JSONObject.toJSONString(saleAttrValuesBySpu));
        }, threadPoolExecutor);

        CompletableFuture.runAsync(()->{
            listFeignClient.hotScore(skuId);
        }, threadPoolExecutor);

        CompletableFuture<Void> priceCompletableFuture = CompletableFuture.runAsync(() -> {
            // 3：价格
            BigDecimal price = productFeignClient.getPrice(skuId);
            result.put("price", price);
        }, threadPoolExecutor);

        CompletableFuture.allOf(
                skuInfoCompletableFuture,
                categoryViewCompletableFuture,
                spuSaleAttrListCompletableFuture,
                valuesSkuJsonCompletableFuture,
                priceCompletableFuture).join();

        return result;
    }

}
